How to Get my phone off blackish?

you need to contact the carriers who put it there, it has nothing to do with the manufacturer of the phone

You would have to contact the organization that puts them onto it. I am sure you can find out more with a general web search.

I called Verizon for like 2 weeks to get one of my old devices or of their list. I just have to make sure they route you to that specific department which doesn’t reference by any other name other than Level II Support Reps

I just have to make sure they route you to that

This is a user helping users with tech questions, we are not apple and apple do not read your posts here

to the best of my knowledge then a carrier removing an IMEI from a block list does not involve any interaction from apple

If you wish to reach out to apple then try  Get Support (apple.com),  Contact - Official Apple

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